河北丰宁沙漠化土地综合整治试验示范区规划设计研究

分析了我国北方农牧交错带沙漠化强烈发展类型丰宁试验示范区的沙漠化土地综合整治制约因子、沙漠化土地的整治途径，并论述了试区沙漠化土地整治规划设计原则，总体布局和各类沙漠化土地整治的技术问题。     

鄂尔多斯盆地南缘早古生代碳酸盐岩高频沉积旋回分析

鄂尔多斯盆地南缘早古生代碳酸盐岩台地的演化可分低能和高级缓坡、具局限性内陆架盆地的镶边陆架、虎蒸发性内陆架盆地的镶边陆架及断边缘４个阶段，在不同的演化 ，高频沉回旋类型具有明显差异，说明沉积背景控制了碳酸盐岩高频沉积旋回的复杂性、多样性、根据对和线个演经阶段高频旋回的分级栩比及周期计算表明，其驱动机制应与米兰科维奇的天文轨道有关。     

基于多源激光点云融合的建筑物BIM建模

墙体、窗户等单元构件是建筑物重要组成部分,精细提取其几何参数及位置信息对于完整表达建筑物整体模型具有重要意义.针对单一点云数据源无法获取建筑物单元构件相关参数并完整表达室内外模型重建问题,本文提出一整套融合室内外多源点云数据的BIM模型重建技术.为验证方法的有效性,选取河南理工大学测绘与国土信息工程学院教学楼为实验区域...     

Quantitative evaluation of strategies for erosion control on a railway embankment batter

Strategies for erosion control on a railway embankment batter (side slope) are quantitatively evaluated in this paper. The strategies were centred on control (‘do nothing’ treatment), grass seeding, gypsum application, jute mat (an erosion control blanket) placement and planting hedgerows of Monto vetiver grass. Rainfall and runoff were monitored at 1 min intervals on 10 m wide embankment batter plots during 1998 and 1999. Total bedload and suspended sediment eroded from the plots were also measured but only for a group of storm events within sampling intervals. It has been demonstrated that vetiver grass is not cost‐effective in controlling erosion on railway batters within Central Queensland region. Seeding alone could cause 60% reduction in the erosion rate compared with the control treatment. Applying gypsum to the calcium‐deficient soil before seeding yielded an additional 25% reduction in the erosion rate. This is the result, primarily, of 100% grass cover establishment within seven months of sowing. Therefore, for railway embankment batter erosion control, the emphasis needs to be on rapid establishment of 100% grass cover. For rapid establishment of grass cover, irrigation is necessary during the initial stages of growth as the rainfall is unpredictable and the potential evaporation exceeds rainfall in the study region. The risk of seeds and fertilizers being washed out by short‐duration and high‐intensity rainfall events during the establishment phase may be reduced by the use of erosion control blankets on sections of the batters. Accidental burning of grasses on some plots caused serious erosion problems, resulting in very slow recovery of grass growth. It is therefore recommended that controlled burning of grasses on railway batters should be avoided to protect batters from being exposed to severe erosion. Copyright © 2001 John Wiley & Sons, Ltd.     

基于匹配追踪的RGB融合技术及在河道刻画中的应用

准确、高效地获取地震资料的频率信息是时频技术的关键。目前最热门的匹配追踪算法相比常用的小波变换和广义S变换来说,具有更高的时频分辨率和局部自适应性,能同时在时间域和频率域获得较准确的定位,提取较准确的频率域信息,为地震属性研究、油气检测等研究工作服务。RGB色彩融合技术是一种显示技术,它可以将多个频率体分为低、中、高三个频带进行融合显示,全面地反映各频带信息,弥补单一属性包含信息较少的缺点。将采用匹配追踪的RGB色彩融合技术应用于实际地震资料,清楚地刻画了河道的边界,并对河道内部的非均质性有一定程度的反映,较常规属性具有更深刻的意义。     

三度体磁异常的不定积分变换法研究

为发现和圈定干扰覆盖下的不明显异常，作者从三度磁性体的磁异常公式出发，推导磁异常的不定积分变换结果并由参量图方程绘得不定积分变换的磁异常参量图。本文针对2种规则形态磁性体推导其特征点规律，并进而用不同的方法求取磁性体的深度和磁性参数。在不同的空间几何参数条件下，讨论不定积分变换后参量图的曲线变化规律并总结其异常特征。提取判断产状的要素。该方法能简单有效地发现一些重要的地质信息，所得到的空间参数与变换异常间的特征点关系将有助于磁异常的分析。     

改良的数字化测图新方法

阐述了在地形复杂、地貌破碎、作业组较多时一种改良的数字化测图新方法的作业流程。该方法发挥了数字化测图的高精度高效率和模拟法测图善于处理勾绘复杂地貌等高线的长处，为针对不同情况制定合适的测图作业方案增加了一种选择。     

Applicability of Wakeby distribution in flood frequency analysis: a case study for eastern Australia

Parametric method of flood frequency analysis (FFA) involves fitting of a probability distribution to the observed flood data at the site of interest. When record length at a given site is relatively longer and flood data exhibits skewness, a distribution having more than three parameters is often used in FFA such as log‐Pearson type 3 distribution. This paper examines the suitability of a five‐parameter Wakeby distribution for the annual maximum flood data in eastern Australia. We adopt a Monte Carlo simulation technique to select an appropriate plotting position formula and to derive a probability plot correlation coefficient (PPCC) test statistic for Wakeby distribution. The Weibull plotting position formula has been found to be the most appropriate for the Wakeby distribution. Regression equations for the PPCC tests statistics associated with the Wakeby distribution for different levels of significance have been derived. Furthermore, a power study to estimate the rejection rate associated with the derived PPCC test statistics has been undertaken. Finally, an application using annual maximum flood series data from 91 catchments in eastern Australia has been presented. Results show that the developed regression equations can be used with a high degree of confidence to test whether the Wakeby distribution fits the annual maximum flood series data at a given station. The methodology developed in this paper can be adapted to other probability distributions and to other study areas. Copyright © 2014 John Wiley & Sons, Ltd.     

容积率对地价的作用机理及实证研究--以南京市为例

文章在分析容积率对于城市地价影响的作用机理基础上,应用有关城市土地经济学理论和模型,采用边际分析方法,对南京商业、住宅、工业用地的样点数据进行实证分析。研究结果表明,城市规划与城市地价的相互关系十分复杂,但建立两者相互作用的模型是可行的,同时指出城市规划按地价理论来实施并且通过城市规划的实施促进地价空间的合理分布是必要的。研究地价、城市规划的关系,其意义不仅仅局限于如何在城市规划中充分利用地价理论优化城市土地利用结构、提高土地利用效率,同时也是为了在城市规划工作中寻找内在规律,为编制出最佳的土地利用规划及在城市中形成最佳地价空间分布及地价水平奠定基础。